I thik that it added a fantastic new dimension to the game. Two kills per Night, decisions whether to try lynching a Wolf or the Bear, almost untraceable Werebear behaviour balanced by the fact that he is out of the game on a single Wolf kill or lynching (and is trumped by a Wolf survivor). It worked for me.
My only reservation would be that it may have tipped the game against the Wolves, but I doubt that is the case. Another innocent Villager would act the same way as far as hunting for the Wolves is concerened. And they benefit from the two kills per Night. The Wolves were unlucky to have a Wolf go down on the first Day - there was no particular reason to suspect
Mithalwen any more than a number of others that Day.
In my view, it worked well. Although it made for a terrifically long and stressful game.